Comparing Tier 2 Ferocity Masteries
Fresh Blood Your first basic attack against a champion deals an additional 10 (+1 per level) damage (9 second cooldown) In the client it says 6 second cooldown!
Feast Killing a unit restores 20 health (30 second cooldown)
So, who would want to restore 20 health every 30 second when you can deal 10+ extra every 6 or 9? No, I don't believe junglers need Feast now since camp spawn timers are so long and they have more time ganking which just increases the need of damage to champions.